Microfiltration Casein Retentate Whey Protein Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cheese making processes result in highly variable whey protein products with altered properties due to denaturation and acidification, leading to the use of alternative protein sources and loss of micellar stability in caseins.
Innovation Solution
A microfiltration process for skim milk using polymeric membranes at specific temperature and pH conditions to produce a retentate rich in native casein and a permeate rich in native whey proteins, maintaining micellar integrity and avoiding acidification or renneting steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cheese making process with acidification is used, then casein precipitates effectively, but whey protein properties are altered and micellar stability is lost
Solution Approach 1:
The process separates casein and whey protein streams early in the production flow through microfiltration, allowing each protein type to be processed independently. This segmentation prevents the acidification step from affecting whey proteins while still enabling effective casein precipitation in the retentate stream.
Solution Approach 2:
The invention extracts whey proteins from the milk matrix before acidification occurs by using microfiltration to create a permeate stream rich in whey proteins. This extraction protects whey proteins from the harmful acidification step while allowing the retentate to undergo acidification for casein precipitation.
2Quantity of substance
If ultrafiltration is used to concentrate whey proteins, then whey protein concentrate is produced, but product composition becomes highly variable
Solution Approach 1:
The invention changes the separation parameter from ultrafiltration (molecular weight-based) to microfiltration (size-based separation of intact micelles). This parameter change allows whey proteins to remain in the permeate in their native state with consistent composition, while casein micelles are retained for concentrated casein production.
3Ease of manufacture
If heating step is applied to denature whey protein, then whey protein structure changes, but casein separation is facilitated
Solution Approach 1:
The microfiltration separation is performed as a preliminary action before any heating or acidification steps. This preliminary separation places whey proteins in the permeate stream where they are protected from subsequent denaturation, while casein micelles remain in the retentate for easy separation and processing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process yields a concentrated casein-rich retentate suitable for cheese production and a whey protein-rich permeate with high nutritional content, reducing whey protein disposal issues and enhancing cheese manufacturing efficiency while maintaining the natural state of proteins.
Implementation Method 1
subjecting skim milk to microfiltration to provide a retentate which is the concentrated milk product and a permeate which is the product
Implementation Method 2
The microfiltration is carried out using a membrane of 20,000-200,000 daltons pore size
Implementation Method 3
provide a retentate having a protein yield which is rich in casein... The microfiltration retentate (MF retentate) is depleted in whey protein and contains higher weight percentage of casein (70-75%)
Data Source
AI summary
Embodiments of the invention are directed to a process involving microfiltration of milk, providing a product that is useful as a source of casein and another product that is useful as a source of whey protein. Another embodiment of the invention is directed to preparing milk products like casein, dairy beverages, milk protein concentrates and cheese from microfiltration retentate.